64620684629 has 2 divisors, whose sum is σ = 64620684630. Its totient is φ = 64620684628.

The previous prime is 64620684607. The next prime is 64620684641. The reversal of 64620684629 is 92648602646.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38849198404 + 25771486225 = 197102^2 + 160535^2 .

It is a cyclic number.

It is not a de Polignac number, because 64620684629 - 2¹⁶ = 64620619093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64620686629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32310342314 + 32310342315.

It is an arithmetic number, because the mean of its divisors is an integer number (32310342315).

Almost surely, 2^64620684629 is an apocalyptic number.

It is an amenable number.

64620684629 is a deficient number, since it is larger than the sum of its proper divisors (1).

64620684629 is an equidigital number, since it uses as much as digits as its factorization.

64620684629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 53.

The spelling of 64620684629 in words is "sixty-four billion, six hundred twenty million, six hundred eighty-four thousand, six hundred twenty-nine".